Pull-socket.



H. HUBBELL.

PULL SOCKET.

AYI'LIOATION FILED JULY 21, 1910. 1

994,518. Patented June ,1911.

ii: 5 llll 54 43 4 WITNESSES: INVENTOI? ATTORNEY plate detached: Figs. 6 and 7 are respec- HARVEY HUBBELL 0F BRIDGEPOIRT, CONNECTICUT.

PULLSOCKET.

specification of Letters Patent.

Patented J one 6, 1911.

Application filed July 21, 1910. Serial No. 5756958.

To all whom it may congcm:

Be it known that i. ll'iinvny Holmium, a. citizen of the United Suites, residing ali- Bridgeport, county oi l aii'licld, State oi Connecticut, have invented an improvement in Pull-Eh I els, of which the following is a 5})(3Lfll'll'lflll01l.

This invention has for its object to simplit'y, chcapen and to generally improve the construction and mode. of operation of electric pull sockets, and es 'mcially to provide a compact and ornamental pull socket which shall operate in such a manner as to break the circuit at two points simultaneously. With this and other objects in View I have devised the novel structure hereinafter described unlit-then pm'ticularly pointed out in the claims hereunto appended.

In the act-mupanying drawing forming apart of this specification: Figure 1 is an elevation of my novel socket partly broken away to show .thc operating mechanism; Fig. 2 a. detail sectional View on. an en larged. scale, on the line 2--2 in Fig. 3; Fig. f; a. plan view, the "standard being; in section ou tlic line in Fig. 2 looking in thedirection of the arrows; Fig. l a detail sectional view illustrating the mode of regw laling the tension of" the operating spring; Fig. 5 an inverted plan view of the contact lively a plan viewv and elevation of the ad justiugl sleeve, and Figs. 8. 9 and 10 are respectively plan, edge and inverted plan views cl the operating Wheel.

l0 denotes the socket shell. 1L and 12 the upper and lower insulating blocks which are held righlly in place by standards 13 and 14 and L) the screw shell held in place by a screw 16 which passes throiiqgh the lower insulating block and engaioes standard 14. The upper surface of the lower insulating block is provided with tour inclines 17, each' terminating; in an abrupt slioulder 18. 19' denotes a plate lying; upon the surface of one of these inclines and having an extension which is turned under the base of standard 13 and is held in close'cuga.gen1e11ttherewith by the screw 20 which secures said standard in place.

21 denotes a plate lying upon the surface ofthe incline diametrically opposite to the incline l'iaving plate 19, and having an extension which is secured to a metal block 22 ing in a central socket 23 in the of the chain is delachahly engaged.

lower insulating block. It will. be noted that two of the inclines l7, diametrically opposite to each other are left uncovered. l.hcse .l lierur insulating inclines as will presently be described. Block 22 is secured in place by a. screw 311 which secures the center contact 25 in place, passes up'tl'irough the lower insulating block, engages block 22 and the end of which lies in chise contact with the extension of plate 21, as clearly shown in F The center contact shown is a s n-log contact of ordinary construction but any other form of center contactmay be substituted if preferred.

2G denotes the center post which is provided at its lower end with a head 28.

The upper end cl. block 22 is provided with asockct 29 into which the extension of plate 21 misses and which receives insulation 30 which is closed about the head of the center post said insulation and the center post being rigidly secured. in place by cldsing the wall of socket 29,.about them, (see Fig. 2) the closed in wafll of the socket however being wholly out ofcontact with the center post which is completely insulated from plate 21, block 22, screw 2-1 and the center contact.

3' denotes the contact plate which coinprises a body 32 in which a central huh 33 rigidly secured and which is provided with engaging walls 3% and with two downwardly extending spring arms 43 which are adapted to engage the inclines and shoulders on the lower insulating block. The com tact plate engages and is adapted to rotate on the center post.

35 denotes the insulating operating wheel which comprises an. insulating plate 36 having an opening 37 and a metal plate 42 covering said opening on one side and having an opci iiug'with av bearing flange which receives the center'post on which. theopen' ating wheel, oscillates. At the periphery of the operating wheel a trough sl'1apci d chain holder 38 in which the operatingchain 39 lies an d which. is irovided at its inner end with a-suitahlc catch al-(l Wllll which the end chain is preferably of the ordinaryball construction and passes along the chain holder and out through a guide 41 which is rigidly secured in the. socket shell.

The operating wheel lies over the contactplate as clearly shown in Fig. l. Plate 42. on the operating wheel is provided with lugs The - upper end of the center post.

is returned to its normai position after each actuation by an operating spring one end of which engages a lug 46' on plate 42, the

other end engaging a hole a7 in an angleplate 48 carried b an adjusting sleevej49 which has -a slida 1e engagement withthe.

The upper end of the adjusting sleeve is closed and is provided with a slot 50 adapted to be engaged b a'screwdriver. The upper insu' lating b ock is provided with an angular recess 51 which is adapted to receive angle plate 48 loosely and retain the adjusting sleeve against rotation. A spring 52 lying within the adjusting sleeve and bearing against the top of the center postand the closed upper end of the sleeve acts .to normally retain angle plate 48 in the angular recess. d

An enlarged recess 53 in the under side of the upper insulating block extends up to the angular recess, andabove the angular recess is a hole 54 which extends through the block and permits the insertion of a screwdriver from above to'engage slot 50 in the adjusting sleeve when it is required to adjust the tension of the operating spring. To adjust this spring the operator presses the adjusting sleeve downward against the power of spring 52 until the angle plate is out of the angular recess .when the sleeve and angle plate may be rotated in either direction as may be required to adjust the tension of the spring. After adjustment of the operating spring the angle plate is placed in alinemcnt with the an lar recess and spring 52 will seat the ang e plate in the recess when the pressure upon the sleeve is relieved. Stand-- tact.

ard, 18 is rovided'with a binding screw 55 and stan ard 14 with a binding screw 56 to which conducting wires, not shown, are attached. The current passes from standard 13 to plate 19, to'the contact plate, to plate 21- and through screw 24 to the center con- Returning through the lamp, not shown, the current passes to screw-shell 15 and through screw 16 to standard lt and binding screw .56. It will be obvious, therefore, that when the spring arms of the contact plate .arein engagement with plates 19 and 214th! current. will be on.

Anaduation of the operating WheeL-as already described, will carry the spring arms in presence 0 two witnesses.

ofi' plates 19 and 21 said arms droppingiover thembrupt shoulders and into engagement with the insulating inclines thus breaking the cur ent simultaneously inftwo i p'laces. The next actuation of the. operating wheel carries the sprin arms of the contact plate ofl fni n the iusu ating inclines and into engagement with plates 19 and 21 thus closing the circuit again.

Having thus described my invention I claim;

"-1." In a pull socket the combination with a lower insulating block having inclines, plates on certain of said inclines and in the circuit, leaving insulating inclines between the plates, and an upper insulating block having an angular recess,below said angular recess an enlarged recess and above the angular recess a hole, of a metallic block socketed in the lower insulating block, a center post .rigidly secured in the metallic block and insulated therefrom, a rotating contact plate and an oscillating operating wheel mounted on the center post, an adjusting to the angular plate, whereby said wheel is returned after each actuation.

2. In a pull socket the combination with a lower insulating block having inclines, plates on certain of said inclines and in, the circuit, leaving insulating inclines between the plates, and an upper insulating block having an angular recess, of a center post rigidly secured in the lower insulating block, a rotating contact plate and an oscillating operating wheelmounted on the center post, a closed ended slotted adjusting sleeve slidably engaging the center post, an angular plate carried thereby, a spring bearing on the sleeve and the center post and acting to hold the angular plate in engagement. with the angular recess and an operating spring, for the purpose set forth, connected to the operating wheel and to the angular plate.

3. In a pull socket the combination with an insulating block having inclines and plates on certain of said inclines and in the circuit, leaving insulating inclines between the plates, of a metallic block socketed in the insulating block and having a socket, a cenfor post having'a head seated in said socket, insulation between the center post and the metallic block, said center post being retained in place by closing the metal of the socket about the insulation, a rotating contact plate mounted on the center post and electrical connections.

In test-imon whereof I aflix my signature I HARVEY UBBELLQ -Witnesses:

A. M. 'Woos'rnn, ULAH L. Coa'rns. 

